package one.caravan.theopener;

import java.io.File;

import one.caravan.theopener.dummy.FileListAdapter;
import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.support.v4.view.GestureDetectorCompat;
import android.view.GestureDetector.OnDoubleTapListener;
import android.view.GestureDetector.OnGestureListener;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.ListView;

/**
 * A list fragment representing a list of Folders. This fragment also supports
 * tablet devices by allowing list items to be given an 'activated' state upon
 * selection. This helps indicate which item is currently being viewed in a
 * {@link FolderDetailFragment}.
 * <p>
 * Activities containing this fragment MUST implement the {@link Callbacks}
 * interface.
 */
public class FolderListFragment extends ListFragment implements OnTouchListener {

	/**
	 * The serialization (saved instance state) Bundle key representing the
	 * activated item position. Only used on tablets.
	 */
	private static final String STATE_ACTIVATED_POSITION = "activated_position";

	/**
	 * The fragment's current callback object, which is notified of list item
	 * clicks.
	 */
	private Callbacks mCallbacks = sDummyCallbacks;

	/**
	 * The current activated item position. Only used on tablets.
	 */
	private int mActivatedPosition = ListView.INVALID_POSITION;

	/**
	 * A callback interface that all activities containing this fragment must
	 * implement. This mechanism allows activities to be notified of item
	 * selections.
	 */
	public interface Callbacks {
		/**
		 * Callback for when an item has been selected.
		 */
		public void onItemSelected(String id);
	}
	
	FileListAdapter fileListAdapter;

	public GestureDetectorCompat mDetector;

	/**
	 * A dummy implementation of the {@link Callbacks} interface that does
	 * nothing. Used only when this fragment is not attached to an activity.
	 */
	private static Callbacks sDummyCallbacks = new Callbacks() {
		@Override
		public void onItemSelected(String id) {
		}
	};

	/**
	 * Mandatory empty constructor for the fragment manager to instantiate the
	 * fragment (e.g. upon screen orientation changes).
	 */
	public FolderListFragment() {
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		// TODO: replace with a real list adapter.
//		setListAdapter(new ArrayAdapter<DummyContent.DummyItem>(getActivity(),
//				android.R.layout.simple_list_item_activated_1,
//				android.R.id.text1, DummyContent.ITEMS));
		
		
		fileListAdapter = new FileListAdapter(getActivity(), "/", true);
		setListAdapter(fileListAdapter);
		
		mDetector = new GestureDetectorCompat(getActivity(), new MyGestureListener());		

		
		
	}
	
	class MyGestureListener extends SimpleOnGestureListener {
		
		@Override
		public boolean onDoubleTapEvent(MotionEvent e) {
			if (e.getAction() == MotionEvent.ACTION_UP) {
				int position = getListView().pointToPosition((int) e.getX(), (int) e.getY());
				
				if (position >= 0) {
					final File file = fileListAdapter.getItem(position);
					if (file.isDirectory()) {
						fileListAdapter.changePath(file.getPath());
					}
				}				
			}
			
			return super.onDoubleTapEvent(e);
		}
	}
	
	@Override
	public void onViewCreated(View view, Bundle savedInstanceState) {
		super.onViewCreated(view, savedInstanceState);

		// Restore the previously serialized activated item position.
		if (savedInstanceState != null
				&& savedInstanceState.containsKey(STATE_ACTIVATED_POSITION)) {
			setActivatedPosition(savedInstanceState
					.getInt(STATE_ACTIVATED_POSITION));
		}
		
		getListView().setOnTouchListener(this);
	}
	
	

	@Override
	public void onAttach(Activity activity) {
		super.onAttach(activity);

		// Activities containing this fragment must implement its callbacks.
		if (!(activity instanceof Callbacks)) {
			throw new IllegalStateException(
					"Activity must implement fragment's callbacks.");
		}

		mCallbacks = (Callbacks) activity;
	}

	@Override
	public void onDetach() {
		super.onDetach();

		// Reset the active callbacks interface to the dummy implementation.
		mCallbacks = sDummyCallbacks;
	}

	@Override
	public void onListItemClick(ListView listView, View view, int position,
			long id) {
		super.onListItemClick(listView, view, position, id);
//
//		// Notify the active callbacks interface (the activity, if the
//		// fragment is attached to one) that an item has been selected.
//		mCallbacks.onItemSelected(DummyContent.ITEMS.get(position).id);
		

	}
	
	
	

	@Override
	public void onSaveInstanceState(Bundle outState) {
		super.onSaveInstanceState(outState);
		if (mActivatedPosition != ListView.INVALID_POSITION) {
			// Serialize and persist the activated item position.
			outState.putInt(STATE_ACTIVATED_POSITION, mActivatedPosition);
		}
	}

	/**
	 * Turns on activate-on-click mode. When this mode is on, list items will be
	 * given the 'activated' state when touched.
	 */
	public void setActivateOnItemClick(boolean activateOnItemClick) {
		// When setting CHOICE_MODE_SINGLE, ListView will automatically
		// give items the 'activated' state when touched.
		getListView().setChoiceMode(
				activateOnItemClick ? ListView.CHOICE_MODE_SINGLE
						: ListView.CHOICE_MODE_NONE);
	}

	private void setActivatedPosition(int position) {
		if (position == ListView.INVALID_POSITION) {
			getListView().setItemChecked(mActivatedPosition, false);
		} else {
			getListView().setItemChecked(position, true);
		}

		mActivatedPosition = position;
	}

	public boolean upToParent() {
		File current = fileListAdapter.getCurrentFile();
		File parent = current.getParentFile();
		
		if (parent == null || current.equals(parent))
			return false;
		
		fileListAdapter.changePath(parent.getPath());
		
		return true;		
	}


	@Override
	public boolean onTouch(View v, MotionEvent event) {		
		return mDetector.onTouchEvent(event);
	}
	
	
}
